Safety gas-burner.



A. W. BOWDEN. SAFETY GAS BURNER. AAAAAAAAAAAAAAAAA PB..20, 1912.

1,034,866. Patented Aug. 6, 1912.

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UNITED STATES PATENT oEEIoE.

ALANSON W. IBOWDEN, 0F GREENVILLE, MAINE.

SAFETY GAS-BURNER.

Specication of Letters Patent.

Patented Aug. 6, 1912.

Application'led April 20,' 1912. Serial No. 692,089.

I mg device whereby the escape of unlighted gas from the burner isprevented.

A further object of the invention resides in the provision of a burnerhead having arranged thereon a thermostatic tube Vcarrying a valvemember normally disposed over the jet opening of the burner, saldthermostatic tube bemg so mounted as to permit of the application of alighted taper therio whereby the expansive action of a suitable Huidcontained within the tube disposes the valve member to one side of thejet opening to permit of the ignition of the gas which escapestherefrom.

Still another object of the invention is to provide a safety gas burnerof the above ty e wherein the use of springs and similar ho ding devicesis entirely eliminated, whereby the eiiiciency and durabilityy of thedevice is enhanced and the cost of manufacture reduced t0 a minimum.

. With the above and other' objects in view, the invention consists inthe novel features of construction and in the arrangement andcombination of parts, hereinafter more fully described, pointed out inthe claims and shown in the accompanying drawings, in which- Figure 1 isa vertical section view of a gas burner embodying the present invention;Fig. 2 is a top plan view showing the valve member in its open osition;Fig. 3 is a s'ection taken on the line 3 3 of Fig. 2, and Fig. 4 is atop plan view showing the valve member in its closed position.

Referring in detail to the drawing `5 designates the service pipe whichis connected to the gas main and is provided with the usual cock 6whereby the flow' of gas to the burner may be turned on or olf.

The burner consists of a cylindrical head 7 which is provided with acentral longitudinally extending gas receiving chamber 8, one end ofwhich is threaded to receive the threaded end 9 of the gas pipe. Fromthe threaded end portion of the chamber 8 the same tapers lon'tu'dinally to provide a jet opening 10 whic opens jupon the uppersurface of the burner head. The burner head is provided at its upperedge with an annular rim or bead 11 which is disposed above `t-hesurface of the head.

To the annular rim 11, one end of a dat metal tube 12 is secured. Thistube com tains mercury or other expansible Huid and 'is commonlyy knownas a Bourdon tube.

The rim 11 is recessed as at 13 to receive the end of this tube so thatthe end of the tube is exposed at the outer edge of said rim. ThisBourdon tube is of substantially semi- -circular form in plan and isalso curved or inclined upwardly from its outer secured end to its innerfree end as clearlyshown in Fig. 3. The free end of this tube has ai?`tached thereto a valve disk 14 which is nor mally disposed' over the jetopening 10 of the burner head to prevent the'emission of gas therefrom.v

In the use of the device the Iiame of a lighted match or taper is aplied directly to the end of the Bourdon tu e at the rim 11 of the burnerhead 'so that the fluid in said tube is heated, thereby causing the tubeto gradually expand as the tem rature increases and become slightlystraightened or less curved than when in its normal position as shown inFig. 2, so that the valve member on the free end of the tube is disposedabove the surface of the burner head and at one side of the jet openinthe valve member has moved to t is position, the fiame of the match ortaper is applied t0 the jet o ening so that the gas issuing therefrom isignited. It is understood that the expansible tube 12 and the valvemember` 14 are so designed and proportioned that 10. After thetemperature at the jet opening 10 or the base of the gas flame will bejust sufficient to cause the valve to remain open, whereby a very rapidclosure of the jet opening is -a'nd at one side of the How. Thusliability of accidental asphyxiation is prevented. e

From the foregoing it is believed that the construction and manner ofoperation of my improved safety burner, will be clearly understood.

Owing to the simplicity of the invention, it will be obvious that thesame is reliable, eflicient in its action" and may also be produced atvery small cost.

While I have shown and described the preferred form and proportions ofthe various parts, it will be obvious that the device is susceptible ofconsiderable modification without departing from the essential featuresor sacrificing any of the advantages of the invention.

What claim is 1. 4 The combination with a burner having a jet opening,of a Bourdon tube fixed at onel end to the outer surface of vthe burnerbod and at the upper edge thereof for the appli'- cation of a llghtedtaper directly thereto, and a valve member on the other end of said tubenormally disposed in contact with the upper surface of the burner headover the jet opening to close the same and movable to a position abovethe surface of the head jet opening by the expansion of said tube.

2'. The combination with a burner having a jet opening andan annularflange extending above the up r surface of the blirner body, of aBourdin tube fixed at one end to said flange, and normally curvedinwardly and upwardly' therefrom, and a valve member secured to the freeend of the tube normally engaging the upper surface of the burner anddisposed over the jet opening to close the same, said tube beingexpanded by the application of a lighte taper to the fixed end thereofwhereby the.

free inner end of thejtube and normally disposed in frctional engagementwith the upper surface of the burner body and over the jet opening, saidvalve member being movedv to one side of the jet opening and out ofcontact with the surface of the head by the expansion of said tubeinduced by the application of a lighted taper to the fixed end thereof.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

ALANSON W. BOWDEN. Witnesses:

F. W. ALLEN, E. B. CROWLEY.

